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Upsweep
A mysterious sound detected since 1991. It peaks seasonally. Source is near a volcanic region. Loudest in spring and fall. It's been going for over 30 years. We still don't know what makes it.
1991 - Present
Pacific Ocean
0 Upsweep has been sounding in the Pacific for decades.
The Sound
Characteristics:
- Narrow-band upsweep
- Repeating pattern
- Seasonal variation
- Spring/fall peaks
- Consistent since 1991
The Location
Pacific source:
- Near volcanic area
- Between New Zealand
- And South America
- Remote region
- Deep ocean
Best Theory
Volcanic explanation:
- Underwater volcanic activity
- Magma movement
- Hydrothermal vents
- Gas releases
- Natural process
The Mystery
What we don’t know:
- Exact mechanism
- Why seasonal
- Why so regular
- Why 30+ years
- Why consistent
Other Sounds
NOAA detected many:
- Bloop
- Slow Down
- Julia
- Train
- Whistle
The Ocean’s Secrets
What it shows:
- Deep ocean unknown
- Sounds travel far
- Technology reveals
- Mysteries remain
- We know little